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2. Shortt–Synchronome clock - Wikipedia

   en.wikipedia.org/wiki/Shortt–Synchronome_clock

   On the left is the primary pendulum in its vacuum tank. The Shortt–Synchronome free pendulum clock is a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William Hamilton Shortt in collaboration with horologist Frank Hope-Jones, [1] and manufactured by the Synchronome Company, Ltd., of London. [2]

3. Atmos clock - Wikipedia

   en.wikipedia.org/wiki/Atmos_clock

   Older Atmos clock. The first clock powered by changes in atmospheric pressure and temperature was invented by Cornelis Drebbel in the early 17th century. Drebbel built as many as 18 of these, the two most notable being for King James VI & I of Britain, and Rudolf II of Bohemia. The King James clock was known as the Eltham Perpetuum, and was ...

4. Gridiron pendulum - Wikipedia

   en.wikipedia.org/wiki/Gridiron_pendulum

   In ordinary clock pendulums, the pendulum rod expands and contracts with changes in temperature. The period of the pendulum's swing depends on its length, so a pendulum clock's rate varied with changes in ambient temperature, causing inaccurate timekeeping. The gridiron pendulum consists of alternating parallel rods of two metals with different ...

5. This Alarm Clock Shows You the Date, Time and Temperature ...

   www.aol.com/entertainment/alarm-clock-shows-date...

   See It! Get the La Crosse Technology Soluna-S Light Sunrise Black LCD Alarm Clock with Temperature and USB Port for just $23 (originally $36) at Walmart!. According to one customer, “This ...

6. William Hamilton Shortt - Wikipedia

   en.wikipedia.org/wiki/William_Hamilton_Shortt

   William Hamilton Shortt (1881–1971) was a railway engineer and noted horologist, responsible for the design of the Shortt-Synchronome free pendulum clock, a widely used time standard, employed internationally in observatories in the period between the two World Wars.

7. Pendulum clock - Wikipedia

   en.wikipedia.org/wiki/Pendulum_clock

   A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an approximate harmonic oscillator : It swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates.